/* eslint-disable no-tabs */
/* eslint-disable no-useless-return */
/* eslint-disable indent */
<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png">
      </div>
      <!-- 登录表单区域 -->
      <el-form :model="loginForm"
               :rules="loginRormRules"
               ref="loginFormRef"
               label-width="0px"
               class="login_from">
        <!-- 用户名输入框 -->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-s-custom"
                    v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码输入框 -->
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock"
                    v-model="loginForm.password"
                    type="password"></el-input>
        </el-form-item>
        <!-- 按钮区 -->
        <el-form-item class="btns">
          <el-button type="primary"
                     @click="login">登录</el-button>
          <el-button type="info"
                     @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单的验证规则对象
      loginRormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置表单数据
    resetLoginForm () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    // 点击登录按钮，进行初步验证
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 1.将登陆成功之后的token保存到sessionStorage中
        //  1.1 项目中出了其他的API接口，必须登录之后才能访问
        //  1.2 token只在当前网页打开期间生效，所以token保存到sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页，地址是/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: white;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }

  .login_from {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}
</style>
